Thermostatic motor.



E. S. HALSEY. THERMbsTATIc MOTOR.

AIPLIOATION FILED MAY 2Q,1907.

(m Msented Mar. 30, 1909.

WEN-55w.

: 13.0. J' QL 2/? l-Il)\\' ill) 2*. HA LSEY, OF XAHANT, MASSACHUSETTS.

THERMOSTATIC MOTOR.

- Specification of Letters Patent.

Patented Mar-ch 30, 1909.

Application filed Kay 20, 1907. Serial No. 374,556.

T 0 all whom it may concern:

Be it known that I, EDWARDS. HALsEY, a citizen of the United States, residing at Nahant, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement iri'Thcrmostatic Motors, of which the followiw is a specification.

I em )loy in my device a small quantity of a suita lc volatlle liquid sealed within the walls of an elastic, metallic thermostat secured to a wall of the apartmentfof which tlie temperature is to be controlled, and utilize a system of tension chains, wires, or cords, to convey the stress of the volatilizing liquid on the thermostat walls to distant dampers,

4 drafts or valves, which dominate the temperature of said apartment, and thus lift,

turn, rock, or otherwise 0 )erate them so as to secure the desired resu t., l

The object of my invention is to supply an extremely simple, permanent, efficient, inexpensive thermostat, and one very cheaply and easily installed and cared for even by a person unskilled in mechanics; and one readily installed on an old heating system with little or no alteration thereto Referring to the accompanying drawings which illustrate my invention, similar letters refer to similar parts throughout the several views, in which Figure l is a vertical cross section through one of my volatile liquid motor thermostats through the line l1 Fig. 2, and Fig. 2 is a rear ele 'ation of one of the complete then mostats.

The body of the thermostat, or the sealed metallic casing enveloping the liquid and its vapor, is constructed of two circular dished tin plates about two decimeters in diameter, stamped out so as to throw back a rim of about one centimeter in depth all around the circumference. The inner one D is just enou h smaller than the outer one Bso that it slip into the outer one makings close I fit, after which the edges of the two runs are' readily soldered together all around, thus creating a gas tight casing. It will be observed that the inner plate D is fluted by a system of circular concentric corrugations extending from close to the outer edge to a distance of little over two centimeters from the center. This plate is also made thinner than the outside plate, which together-with its corrugated construction makes it quite flexible. Its normal position when not dilat'ed is close up against the concave face of the outer plate B, aslindicatec by dotted lines in Fig. 1. Its o'sition fully dilated is alsoshown by this gulre. Soldered to the outside of the central uncorrugated portion of this flexible diaphragm is a stiff circular phragm being soldered inside it, and the wholestmeture is still further stiffened and strengthened ":by the three legged webbed cast iron crosshar or spider Y, the three projectingife'et' of which supply a means of rigidl supporting the thermostat-out from the Wei 8. centimeter or more, so as to permit air to circulate back of it. Three wood screws passing through holes inlthe feet secure them to the wall. The spider and rim F of the tinreceptacle are securely joined by means of three short curved [strips E of tinned metal centers by whic the are first 'yeted firmly to the three ends 0 the "spit n which then just fits the inside rim, after-1' hich theyare readily soldered very secondlyto it. The

angle leverL is pivoted at its vertexto the R. The two projecting priv otend s'of G each engage the short arms of the two levers H, H, of strip metal which are pivoted to thewehs of the cast spider, so that thei of the diaphragm D and ,IeVer'L these two lo n arms the amount ole-meetindicated by solid and dotted lines Fi 2. Two short wires or chains J link the two extremities of these arms to a ring in order t6 tion and condensatiomlwith changes of temperature, of the volatile substance beneath the diaphragm, all "ofiwhieh will lie-readily Linderstood. It is only necessary to run a brass plate C to distribute the stress of the rovidedwithholes at their harness the power developed by the ebu'lli- I from said-{ring to the heat control mg device itzjis -de'sired to operate; I prefer, however,

where it is found possible, as where'newbuildings'are' to l;e equipped, during construction, or where it is found that wires can -be readily fished through the walls without serious obstruction, to connect the wire di- '.'-rectly to the eye in the long'end of the lever- L, and run it concealed in the wall,- providing a small hole through the latht' -a-nd. plaster through which to -fish the Wirifiiand in which said leveriwill be free to world? 7 The object of the two arms H and H previously described is to provide a ready means for running and connecting the 'tensionwire on the outside of the wall in such-cases as in 2 old work where it is found impossible or impracticable to run through the wall, or where the purchaser desired to install the device himself and lacks the mechanical ability to successfully install the concealed work. The adjustable spiral tension spring adapted to work in the slot Sof the iron frame is not essential to the operation of the device at temperatures from three to six degrees above the oiling point of the liquid employed, but is adapted to be adjusted more or less under tension when it is desired to raise the boiling point a few. degrees higher than that for hicliathe thermostat is normally adapted. The manner of application of the spring will .35 readily be understood by referring to the drawings from which it is seen that the s ring is secured to the rim of the casing an adjusted by a flatheaded screw passing through said rim, and engaging a threaded nut an- 40 chored in one end of the spring. The other end of the spring hooks into a metal strap loop U, the two extremities of which straddle the friction roller R, and engage the two ends of the cross pin G inside the inner cndsof the arms H and H, from which it is obvious that tightening the spring by means of the screw increases the pressure on the diaphragmplate, and therefore increases the boiling and operating point in like proportion. It is important to have a thermostat of large area to. get suflicient power to performthe work to be done properly, and consequently it is desirable that it should lie fiat to the wall.

One of the important objects which I accomplish by my present invention is to' devise a simple and practical means of doing .his, and convey the power of the diaphragm away from the thermostat by a simple tensioned ligament within restricted dimensions (50 and conditions, and with small loss of energy; also a simple and eil'ective means of spring adjustment within these limited dimensions.

I am aware that volatile liquid thermostats are not new, but I am not aware and'do not i ,5 believe that the nple, eflicient system, such r as I have devised, or any oi the featurc thereof which I claim, haveever before bee used.

I claim 1. A tliermostatic motor comprising tw metal plates having upturned rims at th margin, one fitting within the other and sai rims being secured together to form a ilui tight oint and to form a stiffening rim, and lever mounted in position to be actuated b one of said plates, said lever having-direr supporting connections with said stiilenin ring. I

2. A thermostatic motor comprising tw metal plates having marginal rims. secure together, said rims forming a stiiienim ring a rigid frame. directly secured. to said ring and a lever pivotally mounted in said fram and having a portion in position to be acti .ated by one of said'plates.

3. A thermostatic motor comprising tw metal plates'one of which is of relativel stiff inflexible material, said plates havin marginal rims one inclosedby the other an both secured togetherv to form a fluid tigl". joint and to form a stiffening ring, a rigi frame directly secured to said ring and hay ing portions whereby the motor may b secured to a su ort, and a lever pivotall mounted in sai flame and having a 1portio in position to be actuated by the re ativel flexible plate. j

4. In a volatile .liquid thermostat havin an expansion chamber for said volatile flui constructed of two large metal disks scale together at their peri heries and held in rigid framework in w 'ch is pivoted anshaped compression lever for said expansibl chamber, one arm'of said lever lying paralh with itsdiaphragm. and compressing it, whil the-other arm of said lever stands p -l'p r dicular to the face of said diaphragm; a h n spiral spring lying parallel with and in 0105 proximity with the face of said diaphragm one end of said spring engagingsaid erper dicular end of said lever, while the ot er on of said spring is adjustably connected to th rigid -outer frame of said thermostat so the its tension upon said chamber and fluid ca be graduated to alter the temperature volatilization of said fluid as may be desire( r 5. A thermostatic motor comprising tw metal plates having marginal rims standin at substantially a right angle to the plane said plates, said rams being secured togethe to 'form, a fluid tight joint and forming stiffening ring, aispider frame rigidly cor nectcd with said rim and in close roximit to one of said metal plates, an a lev e mounted in said frame.

'6. In a thermostatic motor having a fixe rigid frame F and a flexible diaphragi D secured by said frame; a rigid cross b2 Y secured to said frame and spanning sai l diaphragm; an L shaped lever pivoted. i

aieeel 3 said frame and actuated by said diaphragm two levers H and H interinediately pivoted one on either side of the perpem dicular arm of said L shaped lever, the inner short arm of each of said lovers i l and H engaging with opposite sides of said vertical arms by means of sliding pivots; a

short tensioned ligament J engaging the outer extremities of the two long arms of the levers H and H so as to connect them with the transmitting ligament at, K for the purpose specified.

7. In a thermostatic mot-or a flexible actuating diaphragm; a stiffening frame encircling said diaphragm; a rigid cross piece engaged with said frame and spanning the face of said diaphragm; a primary L-shaped transmitting lever pivoted in said cross piece short inner arms of said'pair of levers being engaged with said primary lever the other ends oi said levers being oined to a common W central main transmitting ligament coupling b means of two short branch ligaments.

In testimony that I claim the above I hereunto set my hand in the presence of two witnesses.

EDWARD s. HALSEY'.

Witnesses:

S. C. HALsEY, M. A. CAMPBELL. 

